Altezza emission issues
Altezza emission issues
29-08-2018, 05:14 AM
I am guessing if a sensor had gone down then it should have thrown up a fault code. More likely to be a mechanical failure like a cat.
sent from my Android SGS 2
1990 Eunos Roadster in Mariner DU blue
Cobalt cat back, Decat pipe, 15in Red Rota GT3 alloys, Toyo tyres, Lowered on Coil overs, Red anti roll bars, 14degree timing mod, white dash kit, illuminated side marker lights,
Halo ring headlights, OEM windblocker, Bluetooth streaming HU, Blue leather handbrake and gear lever gaitor, Centre brake/tail light mod, Blue velour door cards, Polished cam cover, Polished front strut bar, 4xheadrest speakers, JDM floor mats, Suede semi dish steering wheel,
Did you say CO2 or CO.
I am guessing if a sensor had gone down then it should have thrown up a fault code. More likely to be a mechanical failure like a cat.
sent from my Android SGS 2
1990 Eunos Roadster in Mariner DU blue
Cobalt cat back, Decat pipe, 15in Red Rota GT3 alloys, Toyo tyres, Lowered on Coil overs, Red anti roll bars, 14degree timing mod, white dash kit, illuminated side marker lights,
Halo ring headlights, OEM windblocker, Bluetooth streaming HU, Blue leather handbrake and gear lever gaitor, Centre brake/tail light mod, Blue velour door cards, Polished cam cover, Polished front strut bar, 4xheadrest speakers, JDM floor mats, Suede semi dish steering wheel,
29-08-2018, 07:34 AM
Kevpr I think you're right stoney, autos do have pre-cats. Mine's a manual.
The car wasn't cold. I ragged it to the test centre where it was left idling untill it was tested. Yep, original cat. You can only hear the rattling if you jack the car up an bang on the cat. It's not audible while driving.
Yeah, there shouldn't be anything loose in there. If there is, that's a sure sign it's all broken down internally. If it were me I'd get a Sports Cat (for under £100) and have it welded in place of the old cat. Should see increased performance, as well as get through MOT, not to mention sounding loooovely!
![[Image: tempsig2.jpg]](http://i121.photobucket.com/albums/o227/84stoney/tempsig2.jpg)
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:Kevpr I think you're right stoney, autos do have pre-cats. Mine's a manual.
The car wasn't cold. I ragged it to the test centre where it was left idling untill it was tested. Yep, original cat. You can only hear the rattling if you jack the car up an bang on the cat. It's not audible while driving.
Yeah, there shouldn't be anything loose in there. If there is, that's a sure sign it's all broken down internally. If it were me I'd get a Sports Cat (for under £100) and have it welded in place of the old cat. Should see increased performance, as well as get through MOT, not to mention sounding loooovely!
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:
29-08-2018, 07:43 AM
Something caused it to break in the 1st place, you have to find the cause, or a replacement cat will go the same way eventually. So as Toxo said check your sensors and see if any are reading wrong.
"Life's goal is not to arrive safely at the grave in a well preserved body. But, rather to skid in sideways........
totally worn out and broken, shouting 'Holy ****, WHAT A RIDE!'"
FirebirdPhil
29-08-2018, 07:43 AM #13A ratttling cat when you bang it means it is broken, the substrte is held in very solidly, once it rattles it is broke and needs replacing.
Something caused it to break in the 1st place, you have to find the cause, or a replacement cat will go the same way eventually. So as Toxo said check your sensors and see if any are reading wrong.
"Life's goal is not to arrive safely at the grave in a well preserved body. But, rather to skid in sideways........
totally worn out and broken, shouting 'Holy ****, WHAT A RIDE!'"
29-08-2018, 07:47 AM
2tongues A ratttling cat when you bang it means it is broken, the substrte is held in very solidly, once it rattles it is broke and needs replacing.
Something caused it to break in the 1st place, you have to find the cause, or a replacement cat will go the same way eventually. So as Toxo said check your sensors and see if any are reading wrong.
Yeah, always a good idea to check all the sensors are reading correctly too. But a new cat may not necessarily go the same way as the old one. Don't forget this is an original cat, in a car that is probably 13 years old!
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:2tongues A ratttling cat when you bang it means it is broken, the substrte is held in very solidly, once it rattles it is broke and needs replacing.
Something caused it to break in the 1st place, you have to find the cause, or a replacement cat will go the same way eventually. So as Toxo said check your sensors and see if any are reading wrong.
Yeah, always a good idea to check all the sensors are reading correctly too. But a new cat may not necessarily go the same way as the old one. Don't forget this is an original cat, in a car that is probably 13 years old!
ad: It was a tough call to make, but the Supercharged IS200 is being retired. ad:
29-08-2018, 08:01 AM
"Life's goal is not to arrive safely at the grave in a well preserved body. But, rather to skid in sideways........
totally worn out and broken, shouting 'Holy ****, WHAT A RIDE!'"
FirebirdPhil
29-08-2018, 08:01 AM #15true, they should lset 10 years or so. But you should check all the things that kill cats also rather then just throwing parts at the issue.
"Life's goal is not to arrive safely at the grave in a well preserved body. But, rather to skid in sideways........
totally worn out and broken, shouting 'Holy ****, WHAT A RIDE!'"
29-08-2018, 08:08 AM
Kev have you had a misfire at all? and can you post the CO, O2 and HC figures please. not interested in CO2 figures as this is just a by product of combustion.
High O2 +high CO + high HC=misfire do to over rich mixture
high O2 +low CO + high HC= lean misfire
High O2 +Normal CO +high HC= miss do to mechnical or igniton problems
High O2 + normal CO + normal HC= O2 getting into exhaust via air pump, or exhuast leak
if HC goes up, O2 should go up
If HC goes down, O2 should go down
if CO goes down, O2 should goes up
If CO goes up, O2 should go down
CO2 should be highest at the engines most efficient spot
C02 goes down if anything else moves.
Edited 10-10-2011, 05:48 PM by Phil01.
1990 Eunos Roadster in Mariner DU blue
Cobalt cat back, Decat pipe, 15in Red Rota GT3 alloys, Toyo tyres, Lowered on Coil overs, Red anti roll bars, 14degree timing mod, white dash kit, illuminated side marker lights,
Halo ring headlights, OEM windblocker, Bluetooth streaming HU, Blue leather handbrake and gear lever gaitor, Centre brake/tail light mod, Blue velour door cards, Polished cam cover, Polished front strut bar, 4xheadrest speakers, JDM floor mats, Suede semi dish steering wheel,
i would guess its either impact damage/mechanical vibration or material fatigue due to age rather than a melt down due,
Kev have you had a misfire at all? and can you post the CO, O2 and HC figures please. not interested in CO2 figures as this is just a by product of combustion.
High O2 +high CO + high HC=misfire do to over rich mixture
high O2 +low CO + high HC= lean misfire
High O2 +Normal CO +high HC= miss do to mechnical or igniton problems
High O2 + normal CO + normal HC= O2 getting into exhaust via air pump, or exhuast leak
if HC goes up, O2 should go up
If HC goes down, O2 should go down
if CO goes down, O2 should goes up
If CO goes up, O2 should go down
CO2 should be highest at the engines most efficient spot
C02 goes down if anything else moves.
1990 Eunos Roadster in Mariner DU blue
Cobalt cat back, Decat pipe, 15in Red Rota GT3 alloys, Toyo tyres, Lowered on Coil overs, Red anti roll bars, 14degree timing mod, white dash kit, illuminated side marker lights,
Halo ring headlights, OEM windblocker, Bluetooth streaming HU, Blue leather handbrake and gear lever gaitor, Centre brake/tail light mod, Blue velour door cards, Polished cam cover, Polished front strut bar, 4xheadrest speakers, JDM floor mats, Suede semi dish steering wheel,
29-08-2018, 09:32 AM
Phil01 Did you say CO2 or CO.My bad, I meant CO not CO2.
It's never had a misfire while I've had it. I don't have the emission numbers to hand. I think the only thing outside of the norm was CO, everything else looked fine.
Reading the obd was a fail, my mates reader wouldn't link with my car. Need to find someone with one that can read jap cars. My brother might have one but he hasn't got back to me yet.
There are no signs of impact damage on the cat, think it's just old age. It's only a slight rattle but I guessed it was on it's way out anyway. I will check all the sensors before I go and buy anything.
Once again, thanks for your help everybody.
Phil01 Did you say CO2 or CO.My bad, I meant CO not CO2.
It's never had a misfire while I've had it. I don't have the emission numbers to hand. I think the only thing outside of the norm was CO, everything else looked fine.
Reading the obd was a fail, my mates reader wouldn't link with my car. Need to find someone with one that can read jap cars. My brother might have one but he hasn't got back to me yet.
There are no signs of impact damage on the cat, think it's just old age. It's only a slight rattle but I guessed it was on it's way out anyway. I will check all the sensors before I go and buy anything.
Once again, thanks for your help everybody.
29-08-2018, 12:50 PM
![[Image: ormiedit1-2.jpg]](http://i214.photobucket.com/albums/cc320/tempra5/ormiedit1-2.jpg)
TTE supercharger,pr0lex manifold,hks fcd,larger intercooler,apexi induction kit,silicone hose kit,IK22's,polished engine parts,TTE front bumper mod'd for intercooler,TRD side skirts,TRD rear lip,JDM headlights and fogs,10k hid headlights 8k full beam,L8XSS p/plate,fog/brake/light conversion,18"fox rs's,lowered 90mm(f)100mm®,moleys under bars,yellow trd anti rollbars,full stainless exhaust,carbon fiber intake plus so much more
leaving the car idling it just as bad as letting the car cool down....
TTE supercharger,pr0lex manifold,hks fcd,larger intercooler,apexi induction kit,silicone hose kit,IK22's,polished engine parts,TTE front bumper mod'd for intercooler,TRD side skirts,TRD rear lip,JDM headlights and fogs,10k hid headlights 8k full beam,L8XSS p/plate,fog/brake/light conversion,18"fox rs's,lowered 90mm(f)100mm®,moleys under bars,yellow trd anti rollbars,full stainless exhaust,carbon fiber intake plus so much more
30-08-2018, 08:48 AM
At idle O2 sensor was reporting between 0.05 and 0.2v
MAF 2.4g/s
Water temp 91C
At about 3k RPM O2 Sensor went up to .9 then fluctuated between that and .35
MAF 10g/s
Water temp 93C
Does this mean anything to anyone? Did I miss anything?
Ok, so i finally found a machine that was able to read my ecu...
At idle O2 sensor was reporting between 0.05 and 0.2v
MAF 2.4g/s
Water temp 91C
At about 3k RPM O2 Sensor went up to .9 then fluctuated between that and .35
MAF 10g/s
Water temp 93C
Does this mean anything to anyone? Did I miss anything?
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